package com.gc.tpas.util;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(urlPatterns = {"/qa/*","/main","/myinfo","/add"})
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request  = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setContentType("text/html;charset=utf-8");
        HttpSession session  = request.getSession();
        if(session.getAttribute("user")!=null){
            filterChain.doFilter(request,response);
        }else{
            response.getWriter().print("<script>alert('请登录后操作！');location.href='/index'</script>");
        }
    }

    @Override
    public void destroy() {

    }
}
